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L. KLERITJ POLYPANTOGRAPH.

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UNITED STATES PATENT OFFICE.

LJUBOMIR KLERITJ, OF BELGRADE, SERVIA.

POLYPANTOGRAPH.

SPECIFICATION forming part of ALetters Patent No. 512,719, dated January 16, 1894.

Application tiled September 13,1892. Serial No. 445,809. (No model.)

. cation.

is illustrated diagrammatically in two modiiications in Figures 1 to 3 of the accompanying drawings. D

Fig. l is a plan View of a polypantograph with two articulated parallelograms with a' stationary side. Fig. 2 illustrates a polypantograpih with one articulated parallelogram and with a guiding-rod. Fig. 3 is a plan-view of the same construction as Fig. 2, but lmore detailed. Fig. 4 represents in a larger scalev a plan-view of the device carrying the writing appliances. Fig.k 5 is a longitudinal section of a fountain-pen.

In the construction shown in Fig. 1 an articulated parallelogram carrying the Writing or drawing appliances is jointed to a second parallelogram the one side of which is supposed to be stationary. l

lIn Figs. 2 and 3 is shown another construction, in which the one side pf the parallelogram is rigidly connected to a rod sliding between guiding rollers. The latter construction is shown more in detail in Fig. 4.

The pantograph shown in Fig. 1 consists of two articulated parallelograms ct b c d and a b c b. The coupling side b may be supposed to slide along the circumferences of the circles w described by the radii a. and c. Asv ais equal to c and b to b', the side b in every position of the parallelogram is parallel to d, which is held stationary by thepoints 1 and 4, and the turning on the pivots 2 and 3 of the side b determines lthat points on the side b must trace drawings or writin gs all exactly alike. If I therefore attach to theo side b three pens f f 2 f 3, or a greater number `o1' these and write with one ot them, all the other pens will write the same. As this result is `I and VIII.

independent ot' thevlength of the sides a and c, which might be infinite so that the circles a; and of Fig. 1 maybe considered two parallel straight lines wand as shown in Fig. 55

2, passing through the points 2 and 3, at right vangles to the linel y y and consequently also vto the sideb of the second parallelogram. If

I compel the points 2 and 3 to slide along the parallels and cc the distance of .which from 2 to 3 is same as from 5 to 6, and if I turnthe sides a and c equally about the pivots 2 and 3 then the side b of the parallelogram will ,be always parallel to the side b so that writing or drawing appliances attached to points ot' the side b must describe similar letters or figures. I j

The guiding of the points 2 and 3 along the parallels and m is preferably effected by a rod'A B C, parallel to x and x and rigidly con-` nected at B to the side b sliding between two `pairs of stationaryrollers r r2 and r3 r4, Fig.

2. The lapparatus represented in Fig.2 is thus a special construction of thatl shown in Fig. 1.

The side b consists ot a straight and solid orV hollow rod I provided.withprojections or arms In the arms or branches aresitu ated the pivots 5, v6. Between the arms or projections I is journaled a spindle `II (preferably tubular), between screws s in the arms I. 'lhe spindle II carries pairs of arms III IV betweenwhich are journaled short spinf dles VII between screws s these short spindies carrying the pens f' andf3 on arms X. The middle pen fzis rigidlyconnected to the spindle II by an .arm IX. l All the three pens may be turned about the axis of II, thus being raised from the paper. The arms III of thespindle II are provided lwith projecting blades V which project under the arms X.

These arms do not bear directly upon the` f 75 f Fig. 3 illustrates diagrammatically the artaneously with the pen fwhich is necessary when a word is to be begun or a point made. The pens f and f3 press upon the paper by means of their own weight. On the pivot p of the left projection I is provided a stopping or catcliingdevice g h, movable about the vertical pin p so as to slide under the arms III of the part II. The bent lever 7L has on its face a sloping surface such that it can be easily slid under the arm III, and by so lifting it, all the pens are simultaneously raised. In beginning to write the pens arelowered by turning the catching device g h to the left.

The whole apparatus rolls upon four rollers, two near 2 and 3 with their axes parallel to C. The other two rollers are mounted below the projections VIII as casters, to turn about a vertical and a horizontal axis so as to follow all movements of the parallelogram. The device for supporting and lifting the pens applies also to the construction shown in Fig. l which has rollers near 5 and 6 and between 2 and 3. As a drawing or Writing pen I may employ a fountain pen as represented in longitudinal section in Fig. 5.

The cylindrical reservoir R is provided at the bottom with a steel cone with capillary passage and receives from the top through the cap a tube T o'pen at both ends to admit air to fill the space above the level o of the ink, to equalize the internal and external pressures so that the column of pressure upon the writing point is the height of the lower mouth of the air tube above the writing point. Thus the ink discharges uniformly so long as its level is not below thelower mouth of the air-tube. The pressure may be increased or diminished by raising or lowering the air-tube. I-Iaving now particularly described and ascertained the nature of this invention and in what manner the same is to be performed,I declare that what I claim is l. In a pantograph a device for lifting or raising the writing or drawing appliances, consisting of a shaft II journaled in the arms I of the side I; said shaft II carrying (by means of arms III and IV) another shaft VII, the latter carrying by means of arms X the Writing appliances and the shaft II carrying by an arm IX also a drawing-pen &c., and the arms X, X being carried by blades or curved levers V, V of the shaft II, so that when the pen f2 is raised the shaft II is turned and by that the other pensff3 are lifted by means of the armsVV; as set forth.

2. In a pantograph a device for raising and catching the writing appliances, when the apparatus is not used, consisting of a curved blade g h, having a sloping surface and being articulated to the shaft I and adapted to engage by means of the arm 7L under the projections III V; as set forth and for the purpose specified.

In testimony whereof I have signed this specification in presence of two subscribing witnesses.

LJ UBOMIR KLERITJ.

Witnesses:

SroJAN MARKovlrsoHr, BOGDAN GAVRILOVITCH. 

